find and correct the error ; (2a+3b) (2a-3b)= 2a^2 - 3b^2
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( 2a + 3b ) ( 2a - 3b )
= ( 2a ) ² - ( 3b )²
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(2a+3b)(a-b) =2a(a-b)+3b(a-b) =2a*2a-2ab+3ab-3b*-3b =4a+ab+9b More
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